23210220121 has 6 divisors (see below), whose sum is σ = 25512060266. Its totient is φ = 21100200000.

The previous prime is 23210220119. The next prime is 23210220157. The reversal of 23210220121 is 12102201232.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20840964496 + 2369255625 = 144364^2 + 48675^2 .

It is not a de Polignac number, because 23210220121 - 2¹ = 23210220119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23210220095 and 23210220104.

It is not an unprimeable number, because it can be changed into a prime (23210227121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 95909880 + ... + 95910121.

Almost surely, 2^23210220121 is an apocalyptic number.

It is an amenable number.

23210220121 is a deficient number, since it is larger than the sum of its proper divisors (2301840145).

23210220121 is a wasteful number, since it uses less digits than its factorization.

23210220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191820023 (or 191820012 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 23210220121 its reverse (12102201232), we get a palindrome (35312421353).

It can be divided in two parts, 2 and 3210220121, that added together give a palindrome (3210220123).

The spelling of 23210220121 in words is "twenty-three billion, two hundred ten million, two hundred twenty thousand, one hundred twenty-one".